package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;

public class LoginInterceptor implements HandlerInterceptor {
    //这里不能用注解依赖注入的原因是，因为LoginInterceptor这个类没有交给spring进行管理，所以要构造函数注入

    @Override
    /**
     * 前置拦截器
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (UserHolder.getUser()==null) {
            //用户不存在，拦截，返回401状态码，未授权
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }
        //放行
        return true;

    }

}
